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    <title>Twisted Cable Pair</title>
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    <h1>Twisted Pair Cost:</h1><br/>
    <table class="hasborder">
        <tr>
            <th>Category</th>
            <th>Maximum Data Rate</th>
            <th>Usual Application</th>
            <th>Approximate Cost</th>
        </tr>
        <tr>
            <td>CAT 1 (de facto name, never a standard)</td>
            <td>Up to 1 Mbps (<a href="http://searchnetworking.techtarget.com/definition/MHz">1MHz</a>)</td>
            <td>Analog voice (<a href="http://searchenterpriselinux.techtarget.com/definition/plain-old-telephone-service" target="_blank">POTS</a>) Basic Rate Interface in ISDN Doorbell wiring</td>
            <td></td>
        </tr>
        <tr>
            <td>CAT 2 (de facto name, never a standard)</td>
            <td>4 Mbps</td>
            <td>Mainly used in the IBM cabling system for Token <a href="http://searchnetworking.techtarget.com/definition/Token-Ring">Ringnetworks</a></td>
            <td>Not a standard</td>
        </tr>
        <tr>
          <td>CAT 3</td>
          <td>16 Mbps	</td>
          <td>Voice (analog most popular implementation)<br /></td>
          <td><a href="http://www.amazon.com/Category-Pair-Data-Phone-cable/dp/tech-data/B000I990WM">1000 ft = $75</a> </td>
        </tr>
        <tr>
          <td>CAT 4</td>
          <td>20 Mbps	</td>
          <td>Used in 16 Mbps Token Ring.<br />Otherwise not used much.<br />Was only a standard briefly and never widely installed.</td>
          <td>Not used anymore<br /></td>
        </tr>
        <tr>
          <td>CAT 5</td>
          <td>100 MHz</td>
          <td>100 Mbps TPDDI<br />155 Mbps ATM. <br />No longer supported; replaced by 5E.<br />10/100BASE-T<br />4/16MBps Token Ring<br />Analog Voice	</td>
          <td>Replaced with 5E<br /></td>
        </tr>
        <tr>
          <td>CAT 5E</td>
          <td>100 MHz</td>
          <td>100 Mbps TPDDI<br />155 Mbps ATM<br />Gigabit Ethernet. <br />Offers better near-end crosstalk than CAT 5</td>
          <td><a href="http://www.cablestogo.com/product.asp?cat_id=3530&sku=27340">1000ft roll = $350</a></td>
        </tr>
        <tr>
          <td>CAT 6</td>
          <td>Up to 250 MHz</td>
          <td>Minimum cabling for data centers in TIA-942.<br />Quickly replacing category 5e.</td>
          <td><a href="http://www.amazon.com/CAT6-Cable-Solid-500MHz-Yellow/dp/B000I20A7I">1000ft roll = $140</a></td>
        </tr>
        <tr>
          <td>CAT 6E</td>
          <td>Up to 500 MHz<br />(field-tested to 500 MHz)	</td>
          <td>Support for 10 Gigabit Ethernet (10GBASE-T.) May be either shielded </td>
          <td></td>
        </tr>
        <tr>
          <td>CAT 7 (ISO Class F)</td>
          <td>600 MHz 1.2 GHz in pairs with Siemon connector</td>
          <td>Full-motion video Teleradiology Government and manufacturing environments
            Fully Shielded (S/FTP) system using non-RJ45 connectors but backwards compatible with hybrid cords.
            Until February 2008, the only standard (published in 2002) to support 10GBASE-T for a full 100m.</td>
          <td><a href="http://www.amazon.com/KEYDEX-Gold-Plated-Snagless-Network-Ethernet/dp/B001BZMMJU">3 ft = $7</a></td>
        </tr>
    </table>
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